Type bar mechanism



March 8, 1932. M. GARBELL TYPE BAR MECHANISM Filed Feb. 23, 1929 Patented Mar. 8, 1932 UNITED STATES PATENT OFFICE MAX GARBELL, OF CHICAGO, ILLINOIS,'ASSIGNOB 'IO VICTOR ADDING MACHINE GOM- PANY, OF CHICAGO, ILLINOIS, A CORPORATIOIT O1 DELAWARE I TYPE BAR MECHANISM Application filed February 2a, 1929. Serial 'No. 341,903.

nism have been integral with the key levers and upstanding and pivoted in an elongated p slot in the levers to allow for the movement p of the link when the key lever was depressed.

With this arrangement, upon depressing the key levers the integral link would be carried gradually closer to the pivotal point of the levers and thereby vary the stroke of the type bar.

The object of the invention is to provide links adapted to be pivoted to the key levers and to the levers actuating the type bars, and

also to provide means for holding the link in an upright position while detached from the levers, and for free movement of the links when attached to the levers, and the key 1evers are depressed.

With a link of this type pivoted to the key levers and normally held in an upright position, it is possible to adjust or twist the link for perfect alinement with the levers, and the link will at all times remain in an upright position, the upper end of which is provided with means for readily assembling the said links to levers while attached to the key levers, to facilitate the assembling of the type bar mechanism.

These features are accomplished by means of the device disclosed in the drawings forming a part of the specification; and in which:

Figure 1 is a longitudinal sectional View I of a typewriting machine embodying the invention.

Fig. 2 is an enlarged view showing a portion of the key lever with the link pivoted thereto. 7

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is a side elevation of the link having a twist in the body thereof.

Fig. 5 is an enlarged detail view of the upper end of the link to more clearly illustrate the connection of the link to the lever.

Fig. 6 is a modified form of the link and the means for normally holding the same in an upright position.

Referring to the drawings 10 designates the frame of a typewritin machine in which is mounted a carriage 11 Traving a platen 12 to receive the im act of the type bars 13 which are pivote to the segment 14 on a ivot 15 and are provided with a toothed ortion 16, adapted to be engaged by the free end of the levers 17 which are pivoted at 18, the levers 17 are in substantially vertical alinement with the type bars and are extended in opposite directions from their pivots.

A t pe bar rest 19 is provided having an exten ing lip 20 to which one end of a tension spring 20a is secured and the other end of which is secured to one of the levers 17, to normally restore the type bars 13 in a rested position.

Each type bar mechanism being identical with each other, an ex lanation of one will suffice for an understan mg of all.

A link 21 is pivoted to the key lever 22 and extends upward and is pivoted to a lever 17. The links may be of any length depending upon the location of the link with respect to the key lever and the lever for obtaining a, uniform depression of the key lever.

Referring more particularly to Figures 2-3 and 4 the link 21 is preferably made of flat stock and is attached to the key lever 22 by means of the pivot pin 23 and is provided with an arcuate slot 24, through which the rivet 25 extends and is secured to an extension 22' of the key lever 22.

Each end of the arcuate slot 24 forms the stops 26 to limit the movement of the link 21 in either direction, when either end is brought to rest against the rivet 25. The pivot pin 23 and the rivet 25 are provided with a head and their body portion being relatively longer than the thickness of the link 21 to allow a rather free movement of the link. A substantially spherical pivot pin 27 is provided at the upper end of the link 21, the free end of the plvot pin 27 is reduced as indicated at 27a, the reduced end 27a extends through an o ening 29 in a leaf spring 28 formed to overhe a portion of the lever 17. The leaf spring 28 is detachably connected to the pivot and its other end is secured to the link.

It will be noted that with this arrangement as above described the link 21 will be held in an upright position with respect to the key lever and for the purpose of assembling 1t may be readily attached to the lever by springing the leaf spring a sufiicient distance to permit the lever to engage the pivot pin and the spring will retain the lever when it is in engagement with the pivot pin.

In assembling a machine with a link of this character, it is necessary to twist some of the links (as shown in Fig. 4) the links in the central part of the machine being straight, while those closer the outer portion of the machine are rovided with a greater twist, to align the pivot 23 with the key lever and the pivot pin 27 with the lever 21.

and pivotally connected to said key lever, said ink having its free end adapted to be connected to the pivotally mounted lever, a projection extending upwardly of said key lever and provided-with a stop, said stop extending through the slot in said link to limit the swinging movement of the link with respect to the key lever.

4. In a'type bar mechanism comprising in combination a type bar, a pivotally mounted. lever connected to the type bar, a key lever having a link pivotally mounted thereon, a projection extending upwardly of saidpivot, stop means on said link coacting with said projection to normally hold the link upright, said key lever being adapted to be positioned with the upstanding link to connect the free end of the link to the pivotally mounted lever.

MAX GARBELL.

As the many levers 17 actuating the type 4 bars respectively are mounted radially according to common practice, and the key levers are mounted parallel to each other and on lines which intersect the radial'lines of the levers 17, making the described twist of the links necessary, the pivotal connection at 27 is substantially that of a universal joint within the desired limits, so that although due to variations in forming operations, for example as to the degree of twist in the links,

the bearing at 17 is nevertheless a free and easily operating one, and one having little friction.

A modified form is illustrated in Fig. 6 of the drawings, a link 21a is pivoted to a key lever 22a with a pivot pin 23a, the link 21a is provided with inwardly turned and spaced apart lugs 26a forming stops to engage an extension 226 on the key lever 22a which will limit the movement of the link 21a in either directionfwhile the link is connected to the key lever and is disengaged from the pivoted lever.

I contemplate as being included in these improvements all such changes, variations and departures from what is thus specifically illustrated and described as fall within the scope of the appended claims.

I claim: 1

1. A type bar mechanism comprising in combination a key lever, a type bar, a pivotally mounted lever connected to the type bar, a link, said link having one end pivoted to the key lever, and the other end adapted to be connected to the pivotally mounted lever, a

projection extending upwardly of the key lever coacting with the link for normally maintaining the link in an upright position.

2. The combination of claim 1 hereof in which stop means including stop elements on the link coact with the projection.

3. In a type bar mechanism, the combination of a key lever, a type bar, a pivotally mounted lever connected to the type bar, a link having a slot adjacent one end thereof 

